walkermamaof4 Posted July 2, 2013 Share Posted July 2, 2013 Cube of cast iron is 8 cu ft and weights 450 per cubic ft. so 3600 lbs total. can a lifting balloon attached to it and inflated to a 4 ft diameter sphere lift it? And can you tell me how to find a video on Kahn Academy to learn about this? I can't figure out what to search for. Thanks! Quote Link to comment Share on other sites More sharing options...
*Michelle* Posted July 2, 2013 Share Posted July 2, 2013 http://www.chem.hawaii.edu/uham/lift.html Quote Link to comment Share on other sites More sharing options...
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